کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1527609 | 1511855 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Test of the Anderson-Stuart model and correlation between free volume and the 'universal' conductivity in potassium silicate glasses
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Test of the Anderson-Stuart model and correlation between free volume and the 'universal' conductivity in potassium silicate glasses Test of the Anderson-Stuart model and correlation between free volume and the 'universal' conductivity in potassium silicate glasses](/preview/png/1527609.png)
چکیده انگلیسی
Following recent finding it is shown that using conductivity and molar volume in binary potassium silicate glasses (considering the same batches) there is a common cubic scaling relation between them due to increase in alkali content. Emphasis is placed on the application of Anderson-Stuart model to describe the variation of activation enthalpy for conduction EA with potassium concentration. In this analysis were considered experimental parameters, like shear modulus G and relative dielectric permittivity É, in wide composition range (between 1.7 and 40Â K2OÂ mol%). The effects of G, É and free volume are taken into account. The drastic drop in conductivity up to 17 orders of magnitude for so many ion-conducting binary alkali silicate glasses is then mainly caused by the structure and the ion content. In particular, it is suggested that the glass network expansion, which is related to the available free volume, is a parameter that could explain the increase in ionic conductivity for this binary system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 105, Issues 2â3, 15 October 2007, Pages 308-314
Journal: Materials Chemistry and Physics - Volume 105, Issues 2â3, 15 October 2007, Pages 308-314
نویسندگان
Marcio Luis Ferreira Nascimento, Shigueo Watanabe,